I use "Lith process Silver Gelatin Print", the gallery has never had a problem getting that onto a label.
I do like to differentiate lith from standard prints, since it's not as repeatable, and it does get people asking questions, which is nice.
The simplicity of just calling it a silver gelatin print has some appeal though.

Lith printing as you are using it is a slang term. The word Lith is a common abbreviation for Lithography and therefore its slang use is likely to be misinterpreted. I know Tim Rudman used "Lith" in the title of his book but the word Lith already had a definition. I call my prints done in the "Lith" process "Infectious Development Silver Gelatin Print"

I can hear the questions now: "just how infectious is this print?" "Is there a vaccine for this?"